18468019 has 4 divisors (see below), whose sum is σ = 19440040. Its totient is φ = 17496000.

The previous prime is 18468017. The next prime is 18468031. The reversal of 18468019 is 91086481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91086481 = 61 ⋅1493221.

It is a cyclic number.

It is not a de Polignac number, because 18468019 - 2¹ = 18468017 is a prime.

It is a super-2 number, since 2×18468019² = 682135451568722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18468017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485982 + ... + 486019.

It is an arithmetic number, because the mean of its divisors is an integer number (4860010).

Almost surely, 2^18468019 is an apocalyptic number.

18468019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18468019 is a deficient number, since it is larger than the sum of its proper divisors (972021).

18468019 is an equidigital number, since it uses as much as digits as its factorization.

18468019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972020.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18468019 is about 4297.4433096901. The cubic root of 18468019 is about 264.3261340941.

The spelling of 18468019 in words is "eighteen million, four hundred sixty-eight thousand, nineteen".